The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
본 논문에서는 동기식 및 비동기식 직접 시퀀스 코드 분할 다중 접속(DS-CDMA) 무선 채널을 위한 새로운 간섭 제거(IC) 방식을 제시합니다. DS-CDMA 시스템에서 MAI(Multiple Access Interference)와 NFP(Near-Far Problem)는 시스템의 용량을 감소시키는 두 가지 요인이다. 본 논문에서는 최대 상관 검출을 통해 모든 간섭 신호를 개별 MAI 신호로 검출할 수 있는 새로운 알고리즘을 제안한다. 이는 간섭 신호의 모든 알려지지 않은 확산 코드의 발견을 기반으로 합니다. 그러면 복제라고 불리는 가능한 모든 MAI 패턴이 간섭 신호의 합으로 생성됩니다. 그리고 실제 MAI 패턴은 수신된 신호와 복제본 간의 상관관계를 취하여 찾아냅니다. 또한, 수신기는 MAI 제거를 순차적으로 실행하여 모든 간섭 신호를 단일 단계로 제거합니다. 수치 결과는 MAI의 해로운 영향과 근거리 문제를 완화하는 제안된 IC 전략이 시스템 성능을 크게 향상시킬 수 있음을 보여줍니다. 특히, 수신 전력이 동일할 때 비동기 시스템의 간섭이 없을 때와 거의 동일한 수신 특성을 얻을 수 있습니다. 또한 동기식 시스템의 모든 수신 전력 상태에서도 동일한 성능을 볼 수 있습니다.
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부
Ranga HETTIARACHCHI, Mitsuo YOKOYAMA, Hideyuki UEHARA, "Interference Cancellation Technique Based on Discovery of Spreading Codes of Interference Signals and Maximum Correlation Detection for DS-CDMA System" in IEICE TRANSACTIONS on Fundamentals,
vol. E91-A, no. 11, pp. 3335-3345, November 2008, doi: 10.1093/ietfec/e91-a.11.3335.
Abstract: This paper presents a novel interference cancellation (IC) scheme for both synchronous and asynchronous direct-sequence code-division multiple-access (DS-CDMA) wireless channels. In the DS-CDMA system, the multiple access interference (MAI) and the near-far problem (NFP) are the two factors which reduce the capacity of the system. In this paper, we propose a new algorithm that is able to detect all interference signals as an individual MAI signal by maximum correlation detection. It is based on the discovery of all the unknowing spreading codes of the interference signals. Then, all possible MAI patterns so called replicas are generated as a summation of interference signals. And the true MAI pattern is found by taking correlation between the received signal and the replicas. Moreover, the receiver executes MAI cancellation in a successive manner, removing all interference signals by single-stage. Numerical results will show that the proposed IC strategy, which alleviates the detrimental effect of the MAI and the near-far problem, can significantly improve the system performance. Especially, we can obtain almost the same receiving characteristics as in the absense of interference for asynchrnous system when received powers are equal. Also, the same performances can be seen under any received power state for synchronous system.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e91-a.11.3335/_p
부
@ARTICLE{e91-a_11_3335,
author={Ranga HETTIARACHCHI, Mitsuo YOKOYAMA, Hideyuki UEHARA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Interference Cancellation Technique Based on Discovery of Spreading Codes of Interference Signals and Maximum Correlation Detection for DS-CDMA System},
year={2008},
volume={E91-A},
number={11},
pages={3335-3345},
abstract={This paper presents a novel interference cancellation (IC) scheme for both synchronous and asynchronous direct-sequence code-division multiple-access (DS-CDMA) wireless channels. In the DS-CDMA system, the multiple access interference (MAI) and the near-far problem (NFP) are the two factors which reduce the capacity of the system. In this paper, we propose a new algorithm that is able to detect all interference signals as an individual MAI signal by maximum correlation detection. It is based on the discovery of all the unknowing spreading codes of the interference signals. Then, all possible MAI patterns so called replicas are generated as a summation of interference signals. And the true MAI pattern is found by taking correlation between the received signal and the replicas. Moreover, the receiver executes MAI cancellation in a successive manner, removing all interference signals by single-stage. Numerical results will show that the proposed IC strategy, which alleviates the detrimental effect of the MAI and the near-far problem, can significantly improve the system performance. Especially, we can obtain almost the same receiving characteristics as in the absense of interference for asynchrnous system when received powers are equal. Also, the same performances can be seen under any received power state for synchronous system.},
keywords={},
doi={10.1093/ietfec/e91-a.11.3335},
ISSN={1745-1337},
month={November},}
부
TY - JOUR
TI - Interference Cancellation Technique Based on Discovery of Spreading Codes of Interference Signals and Maximum Correlation Detection for DS-CDMA System
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3335
EP - 3345
AU - Ranga HETTIARACHCHI
AU - Mitsuo YOKOYAMA
AU - Hideyuki UEHARA
PY - 2008
DO - 10.1093/ietfec/e91-a.11.3335
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E91-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2008
AB - This paper presents a novel interference cancellation (IC) scheme for both synchronous and asynchronous direct-sequence code-division multiple-access (DS-CDMA) wireless channels. In the DS-CDMA system, the multiple access interference (MAI) and the near-far problem (NFP) are the two factors which reduce the capacity of the system. In this paper, we propose a new algorithm that is able to detect all interference signals as an individual MAI signal by maximum correlation detection. It is based on the discovery of all the unknowing spreading codes of the interference signals. Then, all possible MAI patterns so called replicas are generated as a summation of interference signals. And the true MAI pattern is found by taking correlation between the received signal and the replicas. Moreover, the receiver executes MAI cancellation in a successive manner, removing all interference signals by single-stage. Numerical results will show that the proposed IC strategy, which alleviates the detrimental effect of the MAI and the near-far problem, can significantly improve the system performance. Especially, we can obtain almost the same receiving characteristics as in the absense of interference for asynchrnous system when received powers are equal. Also, the same performances can be seen under any received power state for synchronous system.
ER -